Turning the wheel 90 degrees

[Andrew S]

I am intrigued as to how this works but the suggestion of taking a road wheel off and turning it 90 degrees get rid of a wheel wobble / vibration. This is of course on the basis that the wheel is balanced correctly in the first place. I have experienced this and it cured it and no longer has a front wheel wobble after I did this to one of the front wheels.

How does this work and why?

[milothedog]

I am intrigued as to how this works but the suggestion of taking a road wheel off and turning it 90 degrees get rid of a wheel wobble / vibration. This is of course on the basis that the wheel is balanced correctly in the first place. I have experienced this and it cured it and no longer has a front wheel wobble after I did this to one of the front wheels.

How does this work and why?

Just my thoughts, but when you turn the wheel there is and element of luck involved. You get lucky in that you, by chance, offset the imbalance of the rim and tyre against that of the hubs rotating mass.

A Suspension specialist will have the equipment to spin the wheel up whilst still fitted to the car and balance the the spinning mass much more accurately and eliminate these problems more easily. Your normal tyre fitting outfit can only put the wheel on their machine and correct it. and that's dependent of the skills and ability of the person doing it.


Ian.

[flying farmer]

Sometimes it is just luck with the wheel centralising on the hub better. Since the Stag alloy stud holes are not always (or in my experience not often) concentric with the outer rim, hanging the wheel off the studs as you fit the nuts can result in the wheel actually ending up more or less concentric with the hub depending on the position you start from.

My old PI saloon had rear hubs where the studs were not concentric with the bearings by about 1 / 16 of an inch,, and the rims had stud holes out by the same amount. Carefully fitting the wheels in one position cancelled out the wobble, but turning them through 180 degrees doubled it. The secret is to mark the drums or front hubs in relation to the tyre valve if you have got it vibration free, and always refit the rim the same way round.

Neil

[stagmuffin]

gone are the the days when the old boys in the tyre shops would use the little go cart machine to balance the wheels on the car, that cured all the problems .

[Staggard]

gone are the the days when the old boys in the tyre shops would use the little go cart machine to balance the wheels on the car, that cured all the problems .

Showing your age there ole son

[stagmuffin]

well i guess your right smurf but then i remember you telling me stories about trying to force the metal bands on the wooden wheels , must of been a bugger trying to hold the horse as well

[Staggard]

well i guess your right smurf but then i remember you telling me stories about trying to force the metal bands on the wooden wheels , must of been a bugger trying to hold the horse as well

Neigh Neigh

[GDPR]

Going back to the 70s in the workshop, it was standard practice when removing a wheel for service to mark stud/wheel relationship with a dab of paint so the wheels went back the same way. It saved the owner coming back with garage induced wobble... Or if he was pulling a fast one for a freebie wheel balance we could show it must have been like it.

We had one of the machines that balanced wheels on the car - you put a piezo sensor on the suspension and spun the wheel up to about 80mph with a portable rolling road device and a strobe linked to the sensor showed the spot where it swung out of balance. It took a lot of practice to get it right, but it did account for everything and showed wheel run out when on the hub as the wheel vibrated the living bejeezus out of the driving rollers.

If a balance weight let go when it was at full pelt though it was like a war zone...

[rac]

Going back to the 70s in the workshop, it was standard practice when removing a wheel for service to mark stud/wheel relationship with a dab of paint so the wheels went back the same way. It saved the owner coming back with garage induced wobble... Or if he was pulling a fast one for a freebie wheel balance we could show it must have been like it.

We had one of the machines that balanced wheels on the car - you put a piezo sensor on the suspension and spun the wheel up to about 80mph with a portable rolling road device and a strobe linked to the sensor showed the spot where it swung out of balance. It took a lot of practice to get it right, but it did account for everything and showed wheel run out when on the hub as the wheel vibrated the living bejeezus out of the driving rollers.

If a balance weight let go when it was at full pelt though it was like a war zone...

Was going to mention how back in the day you could get your wheels balanced on the car in fact a motor I had (ford Anglia) showing my age now- it was the only way I could get rid of the wobble--don't hear of em now.

[milothedog]

As I said in post 2# what was once common practice has now become a specialist service.

http://vibrationfree.co.uk/our-services/wheel-balancing/

Not cheap but if it cures the problem then it may be worth the money



Ian.

[Andrew S]

Just had new tyres fitted and very pleased with them. Had all wheels balanced but hadnt really driven the car until last weekend. On the way to the show, guess what, yep, the steering wheel started to give me a nice wobble between 55mph up to just under 70mph. Presuming the wheels had not been balanced correctly I was going to take it back to the tyre fitter. Then I remembered, this is exactly what happended 6 months ago when I had the old tyres rebalanced. Then I took Martin Stevenons tip of taking a wheel off and turning it 90 degrees. I did the offisde front only as I did last time.......wobble completly gone

So, what does this mean? Does it mean that my hub studs are slightly off centre and matches the alloy with the same problem? Very very odd but pleased as I am driving the Stag to Oxford for a committee meeting Friday

[Staggard]

One of the problems is that the only thing that centres the wheels to the hub are the wheel nuts, which tend to be loose in the holes allowing the wheel to run off centre. Russ turned mine down in the lathe and we sleeved them with stainless steel tube with an OD that was an exact fit in the wheels which now seems to have solved the problem. Graham